ATI RN
Test Questions on Autonomic Nervous System MCAT Questions
Question 1 of 5
White matter tracts that connect the cerebral hemispheres and allow communication between them are called:
Correct Answer: C
Rationale: Commissural tracts (e.g., corpus callosum) connect hemispheres. Others serve different roles.
Question 2 of 5
The hypothalamus is a key component of the endocrine system, controlling the release of hormones from the:
Correct Answer: A
Rationale: The hypothalamus controls the pituitary gland via releasing hormones.
Question 3 of 5
Ventral roots of spinal nerves consist of:
Correct Answer: B
Rationale: Ventral roots carry motor (efferent) fibers only.
Question 4 of 5
Myasthenia gravis is due to receptors being blocked and destroyed by antibodies.
Correct Answer: C
Rationale: Myasthenia gravis involves antibodies blocking/destroying nicotinic acetylcholine receptors at neuromuscular junctions. Epinephrine is a neurotransmitter, 'transient' is unclear.
Question 5 of 5
Valium has an effect on ___ to inhibit neural transmission.
Correct Answer: C
Rationale: Valium (a benzodiazepine) enhances GABA’s inhibitory effect by increasing Cl- channel opening, reducing neural activity.